Sex is the biological term and your teacher needs to know this correction!!
The Y chromosome determines the male sex, as the human morphology is female by default. The SRY control region on the Y chromosome begins it's activity to determine the male sex at about eight weeks into gestation.
Google SRY region.
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The sex chromosomes, specifically the presence of the Y chromosome or lack thereof, determine gender. Typically, individuals with two X chromosomes are female (XX), while individuals with one X and one Y chromosome are male (XY).
Basically, if the chromosomes are XX , the gender is female, which means both parents gave a X chromosome. If the chromosomes are XY, the gender is male, which means the mother gave an X chromosome, and the father gave a Y.
The genes that determines gender can be found in the Y chromosome.
The chromosome carried only by the sperm is called the Y chromosome, which determines the male gender when combined with the X chromosome from the egg during fertilization.
The sperm gamete determines the gender of the offspring in humans. Sperm carries either an X or a Y sex chromosome, while the egg always contains an X chromosome. If a sperm with an X chromosome fertilizes the egg, the offspring will be female (XX). If a sperm with a Y chromosome fertilizes the egg, the offspring will be male (XY).
In humans females are homogametic and males are heterogametic. It is the male biological parent who contributes the sex chromosome that determines the sex of any child.Human females are XX and all their ova carry an X chromosome. Females always give their children an X chromosome.Human males are XY and half their spermatozoa carry an X chromosome and half carry a Y chromosome. Depending on the sex chromosome in its biological father's spermatozoon, a child receives an X or a Y chromosome from its biological father.If a child receives an X chromosome from its father she will be XX and a girl. If a child receives a Y chromosome from its father he will be XY and a boy.
the sperm cell that fertilizes ; y is a boy ; x is a girl